_clientes = new QueryableCollectionView(clientes.Include(c => c.PkCiudadNavigation).ToList()); and I what to change it RadEntityFrameworkCoreDataSource , how Can I Specify this include with RadEntityFrameworkCoreDataSource
Basically, you use the QueryableEntityCoreCollectionView instead of the RadEntityFrameworkCoreDataSource. This will allow you to pass the names of the include tables as the last argument of the QueryableEntityCoreCollectionView constructor.